Silencers for Marine and Offshore Applications

Silencers are used to reduce the noise in “air moving” applications such as air conditioning or ventilation systems, fan  inlets and outlets, enclosure ventilation and other applications.

Silencers are insulated with acoustic infill and an optional central-pod can be inserted in the silencers for higher attenuation. For marine and offshore applications, the  silencers are made in a heavier construction to suit the application.

A manual control single flap damper can be built-in upon request.

Introduction

• Hison Axial Flow Fans, formerly know as Howden Fans are manufactured to International Quality Standard.
• Available from sizes 150mm to 1250mm diameter.
• Incorporate heavy duty marine grade LM-6 or equal cast aluminium impellers with aerofoil blades for better efficiencies and lower sound level.
• Adjustable blades angles designs to meet varied volume and pressure system requirements featuring the blade shank with tapered conical section. The tapered section fits into a conical slot in the hub, providing a taper lock fit. A bolt is cast into the blade, projecting into the hub and is secured on the inside by lock-washer and nut.
• Hison Impellers comes in polypropylene and aluminum.

Performance

• Ranges from 100m³/hr to 250000m³/hr and static pressure up to 125mm.
• Performance of Hison Fans are tested in accordance to BS 848 Part 1 1980, the latest ISO 5801 First Edition 1997-06-1 and many of Hison Axial Fan models are also tested in accordance to AMCA 210-99 Standard for air performance and licensed to bear the AMCA seal.
• Sound level data is in accordance with BS 848 – 1985: part 2. and ISO 5136 First Edition 1990-12-15.

Direction of Air Flow

• Versatility of air flow direction of Form ‘B’ or Form ‘A’

Constructions

• Fan housings are constructed of rolled steel. Fan housing of 500mm diameter and above of up to 10mm thick shall have rolled integral flanges ensuring complete roundness of the casing and accuracy of bolting holes. 450mm diameter and below shall be welded with rolled flat bar flanges continuous welded on both side.
• Blades tip clearance is consistently maintained.
• Standard fans are with extended motor leads to fan housing exterior junction box with IP 56 degree of protection.
• Extended lubrication tubes from motor to exterior of fan housing are standard for motors with lubrication nipple.
• Spark Resistance Construction ring available upon request.
• Fans are installed with protective wire-mesh guard

Balancing Standards

• All fan impellers are statically and dynamically balance to ISO 1940-1973 (E) G:6.3 standard.

Standard Surface Coating

• Hot Dipped Galvanised to EN ISO 461:1999 which also comply to ASTM A123, A153 and BS 729.
• Special painting to user specification is available upon request.

Motors

• All fans shall be supplied with totally enclosed, high efficiency motors of IP 55 degree of protection, foot-mounted Class F insulation, built to International Standards (IEC)
• Special motors such as Explosion proof, 2-speed, Class H or D.C. motors are available to suits each specific application.

Factory Acceptance Tests

• All HISON Fans are checked and tested under the strict ISO procedures undertaken for a Standard Factory Acceptance Test (FAT) before delivery.

Introduction

• Hison Axial Flow Fans, formerly know as Howden Fans are manufactured to International Quality Standard.
• Available from sizes 150mm to 2000mm diameter.
• Incorporate heavy duty marine grade LM-6 or equal cast aluminium impellers with aerofoil blades for better efficiencies and lower sound level.
• Adjustable blades angles designs to meet varied volume and pressure system requirements featuring the blade shank with tapered conical section. The tapered section fits into a conical slot in the hub, providing a taper lock fit. A bolt is cast into the blade, projecting into the hub and is secured on the inside by lock-washer and nut.
• Hison Impellers comes in polypropylene and aluminum.

Performance

• Ranges from 100m³/hr to 250000m³/hr and static pressure up to 125mm.
• Performance of Hison Fans are tested in accordance to BS 848 Part 1 1980, the latest ISO 5801 First Edition 1997-06-1 and many of Hison Axial Fan models are also tested in accordance to AMCA 210-99 Standard for air performance and licensed to bear the AMCA seal.
• Sound level data is in accordance with BS 848 – 1985: part 2. and ISO 5136 First Edition 1990-12-15.

Direction of Air Flow

• Versatility of air flow direction of Form ‘B’ or Form ‘A’

Constructions

• Fan housings are constructed of heavy gauge rolled steel (minimum 6mm thickness). Fan housing of 500mm diameter and above of up to 10mm thick shall have rolled integral flanges ensuring complete roundness of the casing and accuracy of bolting holes. 450mm diameter and below shall be welded with rolled flat bar flanges continuous welded on both side.
• Heavy duty motor mounting plate providing rigid support for standard foot mounting motor to provides easy replacement.
• Blades tip clearance is consistently maintained.
• Standard fans are with extended motor leads to fan housing exterior junction box with IP 56 degree of protection.
• Extended lubrication tubes from motor to exterior of fan housing are standard for motors with lubrication nipple.

Balancing Standards

• All fan impellers are statically and dynamically balance to ISO 1940-1973 (E) G:6.3 standard.

Standard Surface Coating

• Hot Dipped Galvanised to EN ISO 461:1999 which also comply to ASTM A123, A153 and BS 729.
• Blasted to SA 2-1/2 and coated with Hi-built epoxy paints for marine environment and most industrial applications.
• Special painting to user specification is available upon request.

Motors

• All fans shall be supplied with totally enclosed, high efficiency motors of IP 55 degree of protection, foot-mounted Class F insulation, built to International Standards (IEC)
• Special motors such as Explosion proof, 2-speed, Class H or D.C. motors are available to suits each specific application.

Factory Acceptance Tests

• All HISON Fans are checked and tested under the strict ISO procedures undertaken for a Standard Factory Acceptance Test (FAT) before delivery.

Accessories

• Separate upstream and downstream guides vanes
• Mounting Feet
• Inlet Cone
• Matching Flanges
• Wire Guards
• Anti-Vibration Mountings

Introduction

• Hison Axial Flow Fans, formerly know as Howden Fans are manufactured to International Quality Standard.
• Available from sizes 300mm to 2000mm diameter.
• Incorporate heavy duty marine grade LM-6 or equal cast aluminium impellers with aerofoil blades for better efficiencies and lower sound level.
• Adjustable blades angles designs to meet varied volume and pressure system requirements featuring the blade shank with tapered conical section. The tapered section fits into a conical slot in the hub, providing a taper lock fit. A bolt is cast into the blade, projecting into the hub and is secured on the inside by lock-washer and nut.
• Hison Impellers comes in aluminum.

Spark Resistant Constructions

• Hison Axial Flow Fans with Explosion Proof Motor and Spark Resistant Construction (SRC) features can be built in compliance and bear the BASEFA ‘ATEX’ 0299X and 0300X certification or the Standard Spark Resistant Construction (SRC) which is built in accordance to AMCA Standard 99-0401-80 Type B Spark Resistant Construction.
• Extended leads extended to outside of casing in accordance to Explosion proof procedure to explosion proof external fan junction box.
• Anti-Spark Ring on standard fans is available on request.

Performance

• Ranges from 100m³/hr to 250000m³/hr and static pressure up to 125mm.
• Performance of Hison Fans are tested in accordance to BS 848 Part 1 1980, the latest ISO 5801 First Edition 1997-06-1 and many of Hison Axial Fan models are also tested in accordance to AMCA 210-99 Standard for air performance and licensed to bear the AMCA seal.
• Sound level data is in accordance with BS 848 – 1985: part 2. and ISO 5136 First Edition 1990-12-15.

Direction of Air Flow

• Versatility of air flow direction of Form ‘B’ or Form ‘A’

Constructions

• Fan housings are constructed of rolled steel. Fan housing of 500mm diameter and above of up to 10mm thick shall have rolled integral flanges ensuring complete roundness of the casing and accuracy of bolting holes. 450mm diameter and below shall be welded with rolled flat bar flanges continuous welded on both side.
• Blades tip clearance is consistently maintained.
• Extended lubrication tubes from motor to exterior of fan housing are standard for motors with lubrication nipple.

Balancing Standards

• All fan impellers are statically and dynamically balance to ISO 1940-1973 (E) G:6.3 standard.

Standard Surface Coating

• Hot Dipped Galvanised to EN ISO 461:1999 which also comply to ASTM A123, A153 and BS 729.
• Special painting to user specification is available upon request.

Motors

• Motors supplied can be suitable for hazardous areas.

Factory Acceptance Tests

• All HISON Fans are checked and tested under the strict ISO procedures undertaken for a Standard Factory Acceptance Test (FAT) before delivery.

Accessories

• Separate upstream and downstream guides vanes
• Mounting Feet
• Inlet Cone
• Matching Flanges
• Wire Guards
• Anti-Vibration Mountings

VOLUME - to 4600 CFM
PRESSURES - to 2-1/2″ WG
TEMPERATURES - to 450°F

VOLUME – to 200,000 CFM
PRESSURES – to 14″ WG
TEMPERATURES – to 650°F

Weather louvres resist the ingress of rain and moisture and are used where noise is not such a concern or is being treated by some other means. They provide weatherproofing and air transfer and can be made from steel, stainless steel or aluminium and then finished in enamel paint, powdercoated or anodised.

Hison Mancoolers aid in the dissipation of body heat through a higher evaporation rate, helping to prevent heat exhaustion and increase personal safety.

Particularly effective for fast turn around, minimising costly down time or where a clean healthy environment must be maintained for the safety of workers

Features

• Available for sizes 150mm to 2000mm diameter fans.
• Options for construction materials includes mild steel, stainless steel or aluminum
• Option to integrate with or without built-in damper
• Minimum thickness of 3mm

Standard Surface Coating

• Hot Dipped Galvanised to EN ISO 461:1999 which also comply to ASTM A123, A153 and BS 729.
• Blasted to SA 2-1/2 and coated with Hi-built epoxy paints for marine environment and most industrial applications.
• Special painting to user specification is available upon request.